Papers by Keyword: High Speed Fracture

Abstract: Recently, many countries are promoting the collection, the reproduction and the use of consumer goods；aluminum cans, PET bottles, and so on. On the other hand, the reproduction of the glass bottles is not so active excluding use as a returnable bottle, because the recycle cost is high. The glass bottles are fractured by the small fragment for reproduction. The small crushing fragments are called ‘Cullet’. The cullet is melted and molded again as glassware. The surface area is enlarged by making the bottle cullet, and it is possible to melt these efficiently. As a result, it becomes possible to shorten the time to melt the glass bottle and reduce a consumption of the fuel oil. The reasons with not active recycling of the glass bottle are that large-scale crushing equipment is required and it takes a lot of time and cost. This study proposed a new recycling technique for fracturing the glass bottle by using an underwater shockwave by explosive and electric pulse. The shock wave pressures produced by the explosive and the electric pulse energy were measured and the optimum crushing conditions were discussed.

Abstract: The glass containers crushing process for recycling by using underwater shockwave was observed and the new cullet generation technique by explosive energy was proposed. In this study, the high-speed fracture behaviors of glass containers were visualized by using the high-speed photography and FEM simulation.

Abstract: The high-speed fracture phenomena of glass bottles by using underwater shock wave technique for recycling the glass containers were discussed. The proposed technique is an efficient method for the crushing of glass bottles. In this study, the influence of various explosive conditions, that is, the explosive shape, set position, amount, the bottle size and the contents of bottle, on the cullet size, which is the crushed glass fragments, was studied. Furthermore, the behaviors of underwater shock wave were observed by high-framing photograph and the high-speed fracture mechanism was clarified.

Abstract: The high-speed fracture mechanism of glass bottles by using underwater shockwave and the recycling process by crushing the glass bottles were discussed. The proposed crushing process of the glass bottles can decrease the recycle cost by generating small fragments called "Cullet" and by executing the washing process at the same time as the crushing process. In this study, the relations between the "Cullet" sizes and various explosive conditions, that is, the distance from explosive, the amount, the velocity and the shapes of explosive, were clarified by using beer bottles, and the influence of the serial and concentric arrangements of two or more bottles on "cullet" sizes were examined. Moreover the behaviors of the underwater shockwave were observed by framing photograph method, shadowgraph method, illumination photography method and the FEM simulation was executed in order to make clear the high speed fracture mechanism.

Abstract: The high-speed fracture mechanics of glass bottles by using underwater shockwaves technique and its application for recycling system of glass bottles were discussed. The proposed small fragments, also called “Cullet”, generation technique can decrease the recycling cost by carrying out of crashing and cleaning process simultaneously. In this study, the effects of the explosive conditions and multi-specimen’s arrangements on the “Cullet” sizes were investigated and basic data for commercialization of this method were obtained. An FEM simulation and framing photograph were used to observe underwater shock wave and fracture propagation.

Abstract: As the application technique for glass bottle’s recycling system, a new “Cullet” generation method by using underwater shock wave was proposed. This small fragmentation technique of glass bottles has a lot of excellent advantages such as the simplification of process by simultaneous cleaning and crushing operation, the high collect rate of “Cullet” and so on. In this study, the relation between of the explosive conditions and “Cullet” sizes were clarified and the high speed fracture process of glass bottle was observed by framing photograph of high speed image converter.